def calc_punishapoc():
    inp = input('Please enter a word ("CONCLUDE" to stop entering): ')
    return inp


mylist = []

while True:
    inp = calc_punishapoc()
    if inp in mylist:
        print('That already exists in the list')
    elif inp == 'CONCLUDE':
        break
    else:
        mylist.append(inp)

mylist.sort()
print('Here is a sorted list of unique instrument(s): ')
print(mylist)
